Update for docker volume create

Signed-off-by: yuexiao-wang <wang.yuexiao@zte.com.cn>

cli/command/volume/cmd.go

@@ -36,13 +36,13 @@ volume is a specially-designated directory that by-passes storage driver
 management.
 
 Data volumes persist data independent of a container's life cycle. When you
-delete a container, the Engine daemon does not delete any data volumes. You can
+delete a container, the Docker daemon does not delete any data volumes. You can
 share volumes across multiple containers. Moreover, you can share data volumes
 with other computing resources in your system.
 
 To see help for a subcommand, use:
 
-    docker volume CMD help
+    docker volume COMMAND --help
 
 For full details on using docker volume visit Docker's online documentation.
 

cli/command/volume/list.go

@@ -76,7 +76,7 @@ func runList(dockerCli *command.DockerCli, opts listOptions) error {
 
 var listDescription = `
 
-Lists all the volumes Docker knows about. You can filter using the **-f** or
+Lists all the volumes Docker manages. You can filter using the **-f** or
 **--filter** flag. The filtering format is a **key=value** pair. To specify
 more than one filter,  pass multiple flags (for example,
 **--filter "foo=bar" --filter "bif=baz"**)